lalo82 lalo82
  • 04-08-2018
  • Mathematics
contestada

(1/x-2)-(1/x+2)=
(A)=0
(B)=-(1/4)
(C)=(-4/x^(2))
(D)=(4/x^(2)-4)
(E)=(2x/x^(2)-4)
show work

Respuesta :

gmany
gmany gmany
  • 04-08-2018

[tex] \dfrac{1}{x-2}-\dfrac{1}{x+2}=\dfrac{x+2}{(x-2)(x+2)}-\dfrac{x-2}{(x-2)(x+2)}\\\\=\dfrac{(x+2)-(x-2)}{(x-2)(x+2)}=\dfrac{x+2-x+2}{(x-2)(x+2)}=\dfrac{4}{x^2-4}\to(D) [/tex]

Used: [tex]a^2-b^2=(a-b)(a+b)[/tex]

Answer: (D)=(4/x^(2)-4)

Answer Link

Otras preguntas

A story was being told by him ( change into active voice)​
what is the scale factor from figure A to figure B
What is the value of a?
which of the following animals give direct birth to babies?I. bat ii. Blue whale iii. boa(a snake)I've. all of these​
a boy jumps out of the bus . there is danger for him to fall: a) towards moving bus b)away from moving bus c) in the directioin of motion d) opposite to the dir
Who are agree on xenotransplantation
okay so basically i need to make a video on how technology is a two edged sword and i need to show its negative and positives? but i’d like for ideas as i can’t
Chứng minh chương trình các môn học về tự nhiên và xã hội có cấu trúc đồng tâm và phát triển.
Complete the table for the given rule. Rule: y is 0.75 greater than x x y 0 3 9
Activity Convert these mililitres to litres. a. 1436 ml​